7 PRC load

[axeforce6]

Anyone using H1000?
This is 68gn H1000 behind a 175gn ELDX.
Easy bolt lift and zero signs of pressure.

26” barrel?

 

[TheCoyote]

Yeah 26".

 

[Gadjet]

68gr H1000, Fed 215 primers, 175 ELD-X - getting 2850 w/ 20" barrel.

How was your accuracy?

 

[TEWONG]

How was your accuracy?

Accuracy is acceptable, 15rds at .84 MOA.

 

[mtmojo]

I'm seeing 2960 with a 24" using H1K with a 180 Berger VLD Hunting. I'll just add that with the 195 EOL I'm seeing 2824 with H1K in case you're ever looking to go that heavy.

 

[jeetS]

OK So over the last month I loaded up a few loads and went shooting twice.
I am very inexperiaced at this but learning lots.

Peterson Brass Fed 215 primers 175eldx
Weatherby backcountry 2.0 24" barrel unfired so breaking in.
I sighted in and did the breakin with some factory hornady 175 eldx probably about 12 rounds of the factory loads.
Factory precision hunter was around 2940fps

First outing I did 6 rounds of each load. 3 @ 100yd and 3 @ 300yd

I know 3 shot groups arent great for accuracy determinations but just trying to get a starting point.

H4831
62.4 ~ 2850fps
63.4 ~ 2895fps
Neither grouped well at 300yd
the 63.4 didnt group well at 100 either.

IMR7828
64g ~ 2860fps
65g ~ 2915fps

The 65g was a decent group at 300yd about 3"



Target Photos posted in a 7PRC Powder thread, search my history



VV N565
68.5 ~ 2915
69.3 ~ 2950
The 69.3 didnt group great at 300 nor 100 but the 68.5 was really nice 1.5" at 300yd







So then last week I loaded up some more to shoot at 300yd. 3 shot groups again.



IMR 7828
65g ~ 2940 around 4" group - 300yd
66g ~ 2975 Around 3" group - 300yd

VV N565
68.5 ~ 2912-2925 1.5" group - 300yd
69 ~ 2925-2937 6" group - 300yd
69.5 ~ 2949-2975 6" group - 300yd

Target Photos can be seen in a different thread I posted in.
Targets are 12"x18" Gun is in a sled.
Seems my point of impact has shifted right some since a few weeks ago.


So im not really sure where to go from here if I just stick with the low 2900s fps and the nice accuracy or keep experimenting

 

[tdub815]

Joining the conversation here.
20” OMR barrel, on UM modified Tikka action sitting in an XLR Mg chassis.
Goal is to shoot the 180 ELD-M at 2800
215 primers and Hornady brass (new)
So far I’ve just experimented with H1000.
66gr - 2670 (too slow so only 1 shot)
67gr - 2736 (2 shots read, still too slow)
68gr - 2775 (3 shots, SD=2.5, ES=5.1)
69gr - 2842 (3 shots, SD=12.5, ES=30.3)
70gr - 2880 (3 shots, SD=20.1, ES=47.8)

All grouped well, 70gr not so well. The lateral movement in shots 68 and 69 are me getting up and moving in between shots so I’m not worried about that.

Going to test more in the 68-69 range to see if I can dial in on 2800 and get the results I did with 68gr. 68 will definitely be retested with 5 shot groups at 100, 300, and 1000.

Also picked up some N565 after reading through this thread, so going to try some loads with that.

 

[TheCoyote]

Is N565 temp stable?

 

[tdub815]

Is N565 temp stable?

My assumption would be yes.

 

[Harvey_NW]

Is N565 temp stable?

N565 is dialed in at .77fps/1°F in my 6.5PRC load tested from 29-88°F. With that input in the AB software in my rangefinder it's been extremely consistent with elevations in different temps/atmospherics, if I miss it's from a bad wind call.

 

[wind gypsy]

OK So over the last month I loaded up a few loads and went shooting twice.
I am very inexperiaced at this but learning lots.

Peterson Brass Fed 215 primers 175eldx
Weatherby backcountry 2.0 24" barrel unfired so breaking in.
I sighted in and did the breakin with some factory hornady 175 eldx probably about 12 rounds of the factory loads.
Factory precision hunter was around 2940fps

First outing I did 6 rounds of each load. 3 @ 100yd and 3 @ 300yd

I know 3 shot groups arent great for accuracy determinations but just trying to get a starting point.

H4831
62.4 ~ 2850fps
63.4 ~ 2895fps
Neither grouped well at 300yd
the 63.4 didnt group well at 100 either.

IMR7828
64g ~ 2860fps
65g ~ 2915fps

The 65g was a decent group at 300yd about 3"



Target Photos posted in a 7PRC Powder thread, search my history



VV N565
68.5 ~ 2915
69.3 ~ 2950
The 69.3 didnt group great at 300 nor 100 but the 68.5 was really nice 1.5" at 300yd







So then last week I loaded up some more to shoot at 300yd. 3 shot groups again.



IMR 7828
65g ~ 2940 around 4" group - 300yd
66g ~ 2975 Around 3" group - 300yd

VV N565
68.5 ~ 2912-2925 1.5" group - 300yd
69 ~ 2925-2937 6" group - 300yd
69.5 ~ 2949-2975 6" group - 300yd

Target Photos can be seen in a different thread I posted in.
Targets are 12"x18" Gun is in a sled.
Seems my point of impact has shifted right some since a few weeks ago.


So im not really sure where to go from here if I just stick with the low 2900s fps and the nice accuracy or keep experimenting

I'd load up 10 rounds of 68.0 gr n565 (or even a little lighter charge) to see if it shoots as well as your couple small samples of 68.5 gr. If it shoots good I'd want to call it done (we all have different levels of not being able to leave well enough alone). Reason being is it seems 68.5 is real close to a level of pressure that your gun dont like. As you get more firings and a more seasoned barrel, pressure/velocity will likely climb and you might be right back into 2 MOA 3 shot groups you're seeing with 69 gr+.

And if "gun is in a sled" means lead sled, quit doing that.

 

[jeetS]

I'd load up 10 rounds of 68.0 gr n565 (or even a little lighter charge) to see if it shoots as well as your couple small samples of 68.5 gr. If it shoots good I'd want to call it done (we all have different levels of not being able to leave well enough alone). Reason being is it seems 68.5 is real close to a level of pressure that your gun dont like. As you get more firings and a more seasoned barrel, pressure/velocity will likely climb and you might be right back into 2 MOA 3 shot groups you're seeing with 69 gr+.

And if "gun is in a sled" means lead sled, quit doing that.

Thanks for the input!

Why stop the sled? I was only using it for testing the load with the small sample sizes trying to eliminate the shooter error...
Once load figured out the sled won't be used anymore obviously

Only other rifle I've spent time behind is a 50 year old rem 30-06

 

[Buffalo-Jo]

Loaded up some 180 ELDMs for my Christensen Ridgeline - 22" carbon barrel. I had been running 175 ELDx with 66gr H1000 right around 2820fps. Groups opened up for me above 66gr for the 175 ELDx.

Finally got the 180s loaded up and shot them yesterday morning. Loaded everything to about 0.010" off lands just as a guess based on previous hornady results - no issues fitting in LA mag box. It was still very warm in the valley that I shoot in and I let the barrel cool for ~5min between every shot with a small fan blowing down barrel. I shot these round robin to account for the changing environmental. I saw the ambient air temp go from 73F to 82F and the humidity go from 81% humidity down to 70% humidity by the time I was done. With 5 min between shots, I was shooting my 223 trainer rifle and moving around between shots, so every shot was a fresh set up. All groups are 5 shot groups.
I measured the groups when I got home; the 68gr H1000 had the best group (1.051") and best speed. All the other groups were over 1.25". No signs of pressure at 68gr H1000. I think I will load up more 68gr H1000 and check that in a row to take the changing environmental out of the game and if that is sufficient, I'll call it a load for the year.

 

[Harvey_NW]

Loaded up some 180 ELDMs for my Christensen Ridgeline - 22" carbon barrel. I had been running 175 ELDx with 66gr H1000 right around 2820fps. Groups opened up for me above 66gr for the 175 ELDx.

Finally got the 180s loaded up and shot them yesterday morning. Loaded everything to about 0.010" off lands just as a guess based on previous hornady results - no issues fitting in LA mag box. It was still very warm in the valley that I shoot in and I let the barrel cool for ~5min between every shot with a small fan blowing down barrel. I shot these round robin to account for the changing environmental. I saw the ambient air temp go from 73F to 82F and the humidity go from 81% humidity down to 70% humidity by the time I was done. With 5 min between shots, I was shooting my 223 trainer rifle and moving around between shots, so every shot was a fresh set up. All groups are 5 shot groups.
I measured the groups when I got home; the 68gr H1000 had the best group (1.051") and best speed. All the other groups were over 1.25". No signs of pressure at 68gr H1000. I think I will load up more 68gr H1000 and check that in a row to take the changing environmental out of the game and if that is sufficient, I'll call it a load for the year.
View attachment 907231

5 shot samples have up to 60% variability and are too small to validate any conclusions, it's highly likely that each of those charge weight shoots the same level of dispersion when tested to the point the groups stabilize. If you want good feedback shoot a larger sample for your next test at 68gr, 10 is usually pretty repeatable in a good combo. If it doesn't shoot as tight as you like, test N565/570.

In the future you can save time and components by doing 1 shot each increment for your pressure test, then group test the load with the highest velocity at a verified safe charge.

 

[AKmatt]

175 Berger EH
70gr of h1000
Rem mag primer
ADG brass

Average 2860fps through a 22inch bergara carbon barrel.
0.75" moa 10 shot group

 

[rking17]

Tikka - 180 hybrid target, 68.8 h1000, cci 250. 2875 fps.

Seekins likes 175 ablr with same charge.